Can you get sores from giving blow jobs?

My guess is that you've gotten a mouth ulcer (aka aphta). It is a very normal condition and it can happen for a number of reasons. I see that physical trauma and herpes have already been mentioned, and both of these conditions may cause such ulcers. If you've never had it before, I'd say that the former is the most likely cause. I myself have gotten such ulcers from biting my cheek (and I also get them every once in a while when I have a cold).

Sucky part of this is that it hurts a lot and that you'll have it for a week or two.

An ok article on wikipedia with pictures, so that you can see if this is what you have:
link

And: Before you get all panicky about possible herpes, you should know that the herpes virus is latent in a huge majority of the population. It can be transmitted by i.e. drinking from the same bottle or making out with someone (who have made out with someone before that, and that person has made out with another person and that person has shared a bottle of beer with this person, so, as you can see we're all a big happy family;)). I've probably got herpes latent in my system, and the same applies to the others who have replied to your question.

Bottom line: It's very likely to be completely harmless and normal. If it's very painful or if it doesn't get any better within 2 weeks, go see a doctor.

Take care and good luck!

How do you know? Did you see his test results? You can never really know unless you test for Sexually Transmitted Diseases (STDs) and Sexually Transmitted Infections (STIs). There are several of each out there. Some with multiple strains and varying symptoms and nasty effects. Check out the Center for Disease Control (www.cdc.gov) website regarding all those that are currently known and spreading. The links on the left are specific. You should read them all. You will most likely think twice about having ANY sex after reading the statistics parts, but do not fret - there are alternatives and safety measures to help ward off the Wicked Witch of the West's various curses. Here is a pretty nifty site to also see the wonders of latex - ( www.positive.org) Besides, there is nothing else to do while waiting to see your doctor. I told you that right? No? Oh yes, go see a doctor about your "sore". It could be nothing, but then again.just read the information and you will definitely want to go.

it could be herpes, it could be an std, or it could just be a cold sore. You can get sores from blow jobs.

I would just pray you don't have herpes. Sorry I can't be of much more help

it could simply be from your tooth rubbing on your lip or from the skin getting pinched inside your mouth. I have hurt myself plenty of times by having the wrong angle. I didn't realize it was happening because I was really into it. It will probable go away in a day or so. If it doesn't then worry. How long after did the sore come out?